Geographic trend in mercury measured in common loon feathers and blood
Joseph D. Kaplan, Michael W. Meyer, Peter S. Reaman, W. Emmett Braselton, A. Major, Neil Burgess, Anton M. Scheuhammer
1998, Environmental Toxicology and Chemistry (17) 173-183
The common loon (Gavia immer) is a high‐trophic‐level, long‐lived, obligate piscivore at risk from elevated levels of Hg through biomagnification and bioaccumulation. From 1991 to 1996 feather (n = 455) and blood (n = 381) samples from adult loons were collected between June and September in five regions of North America: Alaska,...
Remote sensing in the USGS Mineral Resource Surveys Program in the eastern United States
Lawrence C. Rowan
1998, Report
Mineral deposits commonly occur within special geologic units or structures, such as fault zones, which can be detected and mapped from aircraft and satellite images. Modern techniques analyze multispectral images that record the way solar energy is reflected or emitted by the materials exposed at the Earth's surface. In sparsely...
Metallogenesis and tectonics of major granitoid-hosted gold metallogenic belts in the Russian Far East and Alaska
Warren J. Nokleberg, Nikolai A. Goryachev, Vladimir I. Shpikerman, Thomas K. Bundtzen, Alexander I. Khanchuk, Vladimir V. Ratkin, Leonid M. Parfenov
R. Seltmann, G.A. Gonevchuk, Alexander I. Khanchuk, editor(s)
1998, Book, Anatomy and textures of ore-bearing granitoids of Sikhote Alin (Primorye Region, Russia) and related mineralization: extended abstracts
Hydrology and snowmelt simulation of Snyderville Basin, Park City, and adjacent areas, Summit County, Utah
Lynette E. Brooks, James L. Mason, David D. Susong
1998, Technical Publication 115
Increasing residential and commercial development is placing increased demands on the ground- and surface-water resources of Snyderville Basin, Park City, and adjacent areas in the southwestern corner of Summit County, Utah. Data collected during 1993-95 were used to assess the quantity and quality of the water resources in the study...
Summary of ground-water quality in West Virginia
M.V. Mathes, Mark D. Kozar, David P. Brown
1998, Report
Water-quality data for the 28 sites in the West Virginia ambient ground-water-quality network and for wells in the U.S. Geological Survey National Water Information System (NWIS) data base for West Virginia were analyzed statistically to identify any water-quality trends and relations and to compare data from the two data sets....
Characterization of an old-growth bottomland hardwood wetland forest in Northeast Texas: Harrison Bayou
Laurence C. Walker, Thomas Brantley, Virginia Burkett
1998, Book chapter, Wilderness and natural areas in Eastern North America : Research, management and planning
Most wetland losses in the southern region over the past 200 years have occurred in bottomland hardwood forests. By 1980 the original extent of palustrine bottomland in Texas had been reduced by 63%, from roughly 16 to 6 million acres. Additional losses have occurred during more recent years as a result of conversion...
Evaluation of two oral baiting systems for wild rodents
Terry E. Creekmore, William Fletcher, David E. Stallknecht
1998, Journal of Wildlife Diseases (34) 369-372
Tetracycline hydrochloride (TC)-treated peanut butter or rodent chow baits were distributed during March 1990, on separate 0.53 ha sites in Oglethorpe County, Georgia (USA). Rodents were trapped on a control site prior to bait distribution and on two baited sites 6 days post-distribution. Cleaned skulls from euthanized mammals were grossly...
Translocated sea otter populations off the coasts of Oregon and Washington
Ronald J. Jameson
Michael J. Mac, Paul A. Opler, Catherine E. Puckett Haecker, Peter D. Doran, editor(s)
1998, Book chapter, Status and trends of the nation's biological resources
The historical distribution of sea otters extended from the northern islands of Japan north and east across the Aleutian chain to the mainland of North America then south along the west coast to central Baja California, Mexico (Riedman and Estes 1990). By the beginning of the twentieth century, after 150...
Stress transferred by the 1995 Mw = 6.9 Kobe, Japan, shock: Effect on aftershocks and future earthquake probabilities
S. Toda, R.S. Stein, P.A. Reasenberg, James H. Dieterich, A. Yoshida
1998, Journal of Geophysical Research B: Solid Earth (103) 24543-24565
The Kobe earthquake struck at the edge of the densely populated Osaka-Kyoto corridor in southwest Japan. We investigate how the earthquake transferred stress to nearby faults, altering their proximity to failure and thus changing earthquake probabilities. We find that relative to the pre-Kobe seismicity, Kobe aftershocks were concentrated in regions...
Black shale source rocks and oil generation in the Cambrian and Ordovician of the central Appalachian Basin, USA
Robert T. Ryder, Robert C Burruss, Joseph R. Hatch
1998, American Association of Petroleum Geologists Bulletin (82) 412-441
Nearly 600 million bbl of oil (MMBO) and 1 to 1.5 trillion ft3 (tcf) of gas have been produced from Cambrian and Ordovician reservoirs (carbonate and sandstone) in the Ohio part of the Appalachian basin and on adjoining arches in Ohio, Indiana, and Ontario, Canada. Most of the oil and gas...
40Ar/39Ar age of the Manson impact structure, Iowa, and correlative impact ejecta in the Crow Creek member of the Pierre Shale (Upper Cretaceous), South Dakota and Nebraska
G. A. Izett, W. A. Cobban, G. B. Dalrymple, J. D. Obradovich
1998, Geological Society of America Bulletin (110) 361-376
A set of 34 laser total-fusion 40Ar/39Ar analyses of sanidine from a melt layer in crater-fill deposits of the Manson impact structure in Iowa has a weighted-mean age of 74.1 ± 0.1 Ma. This age is about 9.0 m.y. older than 40Ar/39Ar ages of shocked...
Similar rates of decrease of persistent, hydrophobic and particle-reactive contaminants in riverine systems
Peter C. Van Metre, Jennifer T. Wilson, Edward Callender, Christopher C. Fuller
1998, Environmental Science & Technology (32) 3312-3317
Although it is well-known that concentrations of anthropogenic radionuclides and organochlorine compounds in aquatic systems have decreased since their widespread release has stopped in the United States, the magnitude and variability of rates of decrease are not well-known. Paleolimnological studies of reservoirs provide a tool for evaluating these long-term trends...
The central and northern Appalachian Basin-a frontier region for coalbed methane development
P.C. Lyons
1998, International Journal of Coal Geology (38) 61-87
The Appalachian basin is the world's second largest coalbed-methane (CBM) producing basin. It has nearly 4000 wells with 1996 annual production at 147.8 billion cubic feet (Bcf). Cumulative CBM production is close to 0.9 trillion cubic feet (Tcf). The Black Warrior Basin of Alabama in the southern Appalachian basin (including...
Evidence for faulting related to dissociation of gas hydrate and release of methane off the southeastern United States
William P. Dillon, W. W. Danforth, D. R. Hutchinson, R.M. Drury, M.H. Taylor, J.S. Booth
1998, Geological Society Special Publication 293-302
This paper is part of the special publication Gas hydrates: relevance to world margin stability and climatic change (eds J.P. Henriet and J. Mienert). An irregular, faulted, collapse depression about 38 x 18 km in extent is located on the crest of the Blake Ridge offshore from the south- eastern...
Depth of the base of the Jackson aquifer, based on geophysical exploration, southern Jackson Hole, Wyoming, USA
Bernard T. Nolan, David L. Campbell, R. Michael Senterfit
1998, Hydrogeology Journal (6) 374-382
A geophysical survey was conducted to determine the depth of the base of the water-table aquifer in the southern part of Jackson Hole, Wyoming, USA. Audio-magnetotellurics (AMT) measurements at 77 sites in the study area yielded electrical-resistivity logs of the subsurface, and these were used to infer lithologic changes with...
Coalbed methane resource potential and current prospects in Pennsylvania
A.K. Markowski
1998, International Journal of Coal Geology (38) 137-159
Coalbed methane gas content analyses from exploratory coal cores and existing data indicate that gas content generally increases with increasing depth and rank. The coal beds studied are from the Main Bituminous field of Pennsylvania (which currently contains 24 coalbed methane pools) and the Northern and Southern Anthracite coal fields....
Degradation of chloroacetanilide herbicides: The prevalence of sulfonic and oxanilic acid metabolites in Iowa groundwaters and surface waters
Stephen J. Kalkhoff, Dana W. Kolpin, E.M. Thurman, I. Ferrer, D. Barcelo
1998, Environmental Science & Technology (32) 1738-1740
Water samples were collected from 88 municipal wells throughout Iowa during the summer and were collected monthly at 12 stream sites in eastern Iowa from March to December 1996 to study the occurrence of the sulfonic and oxanilic metabolites of acetochlor, alachlor, and metolachlor. The sulfonic and oxanilic metabolites were...
Chemistry of unsaturated zone gases sampled in open boreholes at the crest of Yucca Mountain, Nevada: Data and basic concepts of chemical and physical processes in the mountain
Donald C. Thorstenson, Edwin P. Weeks, Herbert Haas, Eurybiades Busenberg, Niel Plummer, Charles A. Peters
1998, Water Resources Research (34) 1507-1529
Boreholes open to the unsaturated zone at the crest of Yucca Mountain, Nevada, were variously sampled for CO2 (including 13C and 14C), CH4, N2, O2, Ar, CFC-11, CFC-12, and CFC-113 from 1986 to 1993. Air enters the mountain in outcrops, principally on the eastern slope, is enriched in CO2by mixing with soil gas,...
Geohistory and thermal maturation in the Cherokee Basin (Mid-Continent, U.S.A.): results from modeling
A. Forster, D. F. Merriam, P. Hoth
1998, American Association of Petroleum Geologists Bulletin (82) 1673-1693
The Cherokee basin in southeastern Kansas contains a stratigraphic section consisting mostly of Permian-Pennsylvanian alternating clastics and thin carbonates overlying carbonates of Mississippian and Cambrian-Ordovician age on a Precambrian crytalline basement. Based on a conceptual model of events of deposition, nondeposition, and erosion, a burial history model for (1) noncompaction,...
Soil relative dating of moraine and outwash-terrace sequences in the northern part of the upper Arkansas Valley, central Colorado, U.S.A.
Alan R. Nelson, Ralph R. Shroba
1998, Arctic and Alpine Research (30) 349-361
Profile development indices for soils developed in moraines and outwash near Twin Lakes and in outwash near Leadville support the correlation of moraines with subdued morphology and two high outwash terraces with the Bull Lake glaciation (ca. 130-160 ka) and the correlation of hummocky moraines and two low outwash terraces...
Noble gases, stable isotopes, and radiocarbon as tracers of flow in the Dakota aquifer, Colorado and Kansas
J.F. Clark, M.L. Davisson, G.B. Hudson, P. A. Macfarlane
1998, Journal of Hydrology (211) 151-167
A suite of chemical and isotope tracers (dissolved noble gases, stable isotopes of water, radiocarbon, and CI) have been analyzed along a flow path in the Dakota aquifer system to determine likely recharge sources, ground water residence times, and the extent of mixing between local and intermediate flow systems, presumably...
Structural and kinematic evolution of the Yukon-Tanana upland tectonites, east-central Alaska: A record of late Paleozoic to Mesozoic crustal assembly
V. L. Hansen, Cynthia Dusel-Bacon
1998, Geological Society of America Bulletin (110) 211-230
The Yukon-Tanana terrane, the largest tectonostratigraphic terrane in the northern North American Cordillera, is polygenetic and not a single terrane. Lineated and foliated (L-S) tectonites, which characterize the Yukon-Tanana terrane, record multiple deformations and formed at different times. We document the polyphase history recorded by L-S tectonites within the Yukon-Tanana...
Near-surface structural model for deformation associated with the February 7, 1812, New Madrid, Missouri, earthquake
J. K. Odum, W. J. Stephenson, K. M. Shedlock, T. L. Pratt
1998, Geological Society of America Bulletin (110) 149-162
The February 7, 1812, New Madrid, Missouri, earthquake (M [moment magnitude] 8) was the third and final large-magnitude event to rock the northern Mississippi Embayment during the winter of 1811–1812. Although ground shaking was so strong that it rang church bells, stopped clocks,...
Late Pleistocene C4 plant dominance and summer rainfall in the southwestern United States from isotopic study of herbivore teeth
S.L. Connin, J. Betancourt, Jay Quade
1998, Quaternary Research (50) 179-193
Patterns of climate and C4 plant abundance in the southwestern United States during the last glaciation were evaluated from isotopic study of herbivore tooth enamel. Enamel ??13C values revealed a substantial eastward increase in C4 plant consumption for Mammuthus spp., Bison spp., Equus spp., and Camelops spp. The ??13C values...
Detrital zircon U-Pb geochronology of Cambrian to Triassic miogeoclinal and eugeoclinal strata of Sonora, Mexico
G. E. Gehrels, John H. Stewart
1998, Journal of Geophysical Research B: Solid Earth (103) 2471-2487
One hundred and eighty two individual detrital zircon grains from Cambrian through Permian miogeoclinal strata, Ordovician eugeoclinal rocks, and Triassic post-orogenic sediments in northwestern Sonora have been analyzed. During Cambrian, Devonian, Permian, and Triassic time, most zircons accumulating along this part of the Cordilleran margin were shed from 1.40–1.45 and...
